Die for forming can-heads



(No Model.) 7

N. TROYER. Y

V M W 0 m w v 1 a. m 0% i I w, M L 9 I v a a Q this purpose.

- v UNITED STATES PATENT OFFICE NELSON TROYER, OF ASTORIA,OREGON.

DIE FOR'FORMING CAN-HEADS.

SPECIFICATION forming part of Letters Patent No. 531,451, dated December 25, 1894.

I Application filed May 24,1894 Serial No. 512,341- (No model.)

To all whom it may concern:

Be it known that I, NELsoN TROYER, a citizen of the United States, residing in Astoria, in the county of Clatsop and State of Oregon, have invented a, new and useful Improvement in Dies for Forming Gan-Heads, of which the following is a specification.

This invention relates to an improved cutting, stamping and creasing die for making from sheet metal, creased, key-opener can heads.

The nature of the invention Willbe understood from the following description and claims, taken in connection with the accompanying drawings, in which Figure 1 is a central vertical section of the device. the same upon a larger scale. Fig. 3, is a bottom view of the face of the upper die, upon a smaller scale than Fig. 1. Fig. 4 is a top view of the can head as made-by the die, being upon the same scale as Fig. 3 and Fig. 5 is a sectional view of said can head shown in Fig. 4.

In said drawings A is the upper die stock and B the lower die stock. I s

a is the cutting ring of the die stock and b the cutting ring of the lower die stock. The ring a is made removable from the die stock, ,being screwed thereon by means of the screw thread a so that it is capable of being fed downward as the cutting edge wears away.

a? is a jam-nut for locking the cutting ring in its proper position Inside of the cutting ring I place in the die stock A two rings 0 0' made of hardened steel, separated from each other by the soft steel ring D.- The outer one, C, of the two hardened rings is supported partly by and against the cutting ring a which is furnished with a ledge a for this purpose; and the inner one, C, is supported partly by and against the soft steel ring D, which is furnished'witha ledge d for E is the central movable portion of the die upon which is placed the key-form projection for making in the head of the can the countersunk recess to receive the key. This movable part E serves as the knock out for the die. The face of the upper die it will be noticedis composed of the cutting ring a, the ring D, the exposed lower surface of the Fig. 2 is a fragmentary section of die stock A, the piece E and the lower inner corners of the two hardened steelrings O, C, which corners are marked respectively 0 and c.

- A description of the lower die stock and its formed is fed between the dies in any suitable manner and the upper die being brought down upon it, the blank is cut out bythe descent of the upper die, and by a further movement is forced into the shape shown at Figs. land 5. At the same time the inner lower corners c, c of the hardened steel rings 0, 0', set into the metal of the can head, forming the creases '6, 0L by a partial severing of the blank at-these lines. The principalwear of the die, and the greatest pressure encountered will be found at these corners c and c, which actually penetrate the metal of the sheet to a greater or less extent, and these corners must be keptsharp.

It will be noticed that the two hardened steel rings 0 and O are easily removed from the die by screwing off the ring a, and being removed can readily be ground and sharpened as occasion requires. It will also be noticed that these hardened steel rings are firmly supported at top and sides by the die stock, the ring a and the intermediate ring D, so that no matter how severe the strain or pressure put upon them, there is no liability for them to break or yield in any direction under strain.

I prefer to surround the ring a with a reinforcement of tough soft steel which is shown in the drawings and forms a part of said ring a, but is not separately lettered, but can be seen as surrounding the ring a. This reinforcing ring also affords the necessary body of metal in which the usual spring holdersone of which is shown, but not lettered-may be mounted.

I claim- 1. In a die for forming sheet metal can I heads, the combination of the die stock, the cutting ring a removably secured to the die stock, and the removable hardened steel rings 0 0 having the sharpened corners c 0 exposed to come in contactwith the sheet metal blank, substantially as specified.

2. In a. die for forming sheet metal can heads, the combination of the die stock, the cutting ring a removably secured to the die stock, the removable hardened steel rings C IO 0 having the sharpened corners c c exposed to come in contact with the sheet metal blank, and the intermediate ring D, substantially as specified.

NELSON TROYER. Witnesses:

F. W. PRAEL, R. PRAEL. 

